Hello,

The eligibility criteria for BS-MS Course (which is offered in subjects such as chemistry, biological science, earth and environmental science, mathematics, and physics) is passed 10+2 from a recognized board with physics, chemistry, biology/mathematics securing 60% aggregate, there is no upper age limit regarding this, admission is generally done through entrance tests such as JEE Main/IISER/NISER to name a few,

some of the top colleges offers BS-MS Integrated Course are as follows;

• Indian Institute of Science, Bengaluru
• IISER Berhampur
• IISER Bhopal
• IISER Kolkata
• IISER Mohali
• IISER Pune
• IISER Thiruvananthapuram
• IISER Tirupati
• Indian Institute of Technology  Kanpur
• National Institute of Science Education and Research, Bhubaneswar

Check out our page at https://www.careers360.com/courses/bs-ms-dual-degree to know more details regarding this.